/**
 * Copyright (C) 2010 dennis zhuang (killme2008@gmail.com)
 * <p>
 * This library is free software; you can redistribute it and/or modify it under the terms of the
 * GNU Lesser General Public License as published by the Free Software Foundation; either version
 * 2.1 of the License, or (at your option) any later version.
 * <p>
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 * <p>
 * You should have received a copy of the GNU Lesser General Public License along with this program;
 * if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 **/
package com.googlecode.aviator.lexer.token;

import java.util.Map;


/**
 * A Number token
 *
 * @author dennis
 *
 */
public class NumberToken extends AbstractToken<Number> {


    private static final long serialVersionUID = 3787410200228564680L;
    private Number value;


    public NumberToken(final Number value, final String lexeme) {
        super(lexeme, 0, -1);
        this.value = value;
    }


    public NumberToken(final Number value, final String lexeme, final int lineNo,
                       final int startIndex) {
        super(lexeme, lineNo, startIndex);
        this.value = value;
    }


    public void setNumber(final Number number) {
        this.value = number;
    }


    public Number getNumber() {
        return this.value;
    }


    @Override
    public Number getValue(final Map<String, Object> env) {
        return this.value;
    }


    @Override
    public TokenType getType() {
        return TokenType.Number;
    }


    @Override
    public int hashCode() {
        final int prime = 31;
        int result = super.hashCode();
        result = prime * result + ((this.value == null) ? 0 : this.value.hashCode());
        return result;
    }


    @Override
    public boolean equals(final Object obj) {
        if (this == obj) {
            return true;
        }
        if (!super.equals(obj)) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        NumberToken other = (NumberToken) obj;
        if (this.value == null) {
            if (other.value != null) {
                return false;
            }
        } else if (!this.value.equals(other.value)) {
            return false;
        }
        return true;
    }

}
